Only hold the genuine repos (disable ppas & third party(ies) sources) into
/etc/apt/sources.list.
Then set the archives to point to 'vivid', and save & close sources.list.
You are now ready to clean the system with: clean, autoclean, autoremove; and
update/upgrade from the package manager.
Start upgrading in that order: tools (apt, dpkg,...), languages (gcc,
python,...), libs then apps
If you meet an upgrading package issue, then try upgrading the others, you will
be able to upgrade it later.
When you have upgraded all the packages, then start again to clean the system
(to remove now unneeded lib/package)
** Changed in: ubuntu-release-upgrader (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1485216
Title:
I've upgraded my 14.04 LTS to 14.10 and now I don't have updates,
can't upgrade to 15.04.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1485216/+subscriptions
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